Marking-pen.



PATENTED FEB. 17, 1903.

J. LA BURT. MARKING PBN.'

APPLICATION FILED NOV. 22, 1902.

N0 MODEL.

UNITED STATES PATENT OFFICE.

JOHN 'LA BURT, on NEW YORK, N. Y.

LM-ARKING-PENI.

SPECIFICATION forming part of Letters Patent No. 720,705 February 17, 1903.

Application filed November 22,1902. Serial No. 182,373. (No model.) I

To all whom it may concern:

' Be it known that I, JOHN LA BURT, of the city of New York, county of Kings, and State of New York, have invented certain new and useful Improvements in Marking-Pens, of

which the following is a full, clear, and exact description.

This invention refers to apen, and particularly to a marking-pen which is used for the marking of packages and boxes where large letters are placed on the outside with ink, and provides for a continuous supply, whereby an improvement is shown over the old style of using a marking-brush. When a brush is used, it of course requires constantreplenishingfrom an ink-pot, and a good deal of time is wasted in this way. I

I have devised a pen that is also adapted for shading, as the amount of ink emitted is regulated by the amount of pressure applied to the pen.

In this pen the. orifice for the emission of ink is kept closed when the pen is not in use, in which way the undue evaporation of the ink is prevented.

In this pen I provide a ball to carry the ink from the reservoir, and I provide a special ball that is adapted to freely carry the ink,

which in marking, as described above, is quite thick, and the ball in itself becomes a miniature reservoir.

With these ends in viewI have devised a device, as hereinafter described, and finally embodied in the clauses of the claim.

Reference is to be had-to the accompanying drawings, forming part of this specification, in which similar figures of reference referto similar parts throughout the several views.

Figure 1 is a side elevation of my improved 4o pen, and Fig. 2 is a vertical section on the line 2 2 in Fig. 1. Fig. 3 is an exaggerated partial section of the ball used in the device, and Fig. 4 is a plan of a modified form of strainer. 1

In the views acasing 10 has screwed thereon a ap v11, these elements being preferably made of sheet metal and adapted to screw together, as shown. In the end of the cap.11 I provide a perforation'into which fits a ball 12, and this ball abuts on a collar 13 on the rod 14, which in turn is provided with a spinforation in the center of with the perforations 16. a central boss 17, and encircling this boss and dle 1 5. This spindle 15 works through a pera'disk 16, provided This disk 16 has the rod 14 and abuttingagainst the coliarl3 is a spring 18, this spring serving to keep the ball 12 It will be evident that the plate 16 keeps back any grit or solids that may get in the ink, and thereby insures a free how of ink from the ball 12 when the pen is used. This ball 12 is preferably made as shown in an exaggerated shape in Fig. 3, in which I show the indentations 12, forming. small chambers, which can be made, as shown, in semicircular form or canobemade deeper to provide more capacity. The oflice of these chambers is to carry the ink around with the ball when the pen is operated and insures of the pen.

In Fig. 4 I show a modification of the strainer to take the place of the perforated plate 16. In this construction I use a spiderplate 19- with the'central boss 20, and on this I lay a screen as shown, or a layer of felt or similar filtering material can be'employed.

When it is desired to use the pen, the easing 10, which serves as a reservoir, is grasped in the hand, and the pen so used as to bring the ball 12 on the surface on which it is desired to write, and by moving the pen the ball 12 rolls on. the surface and gives a comparatively broadclean line, and this, coupled with the free flow of ink, which can be increased by more'pressure, provides a steady writing without replenishing. A bulge 22 can be placed at a convenient portionof the casing 10 to provide by pressure thereon an air-pressure on the ink to start the flow if plenty of ink on the point in the orifice in the end of the cap ll.

there should be a clogging in the perforation in'the end of the cap. When too much pressure is applied to the ball, the upper end of the rod abuts against the boss 17 of the plate 16 and prevents the ball receding-too far into the cap.

It will thus be evident that I have devised a cheap and simple marking-pen that is not liable to become disarranged and in .which a constant flow of inkis insured to the writingpoint.

ICEO

said reservoir, and a spring between the strainer and the ball acting to yieldingly hold the ball in said outlet.

-2. A pen, comprising a casing, a cap on said casing, said casing and cap forming a.

reservoir, said cap having an outlet in the end thereof, a ball in said outlet, a strainer in said reservoir, a spring between the strainer and the ball acting to yieldingly hold the ball in said outlet, and means for limiting the yielding movement of said ball.

3. A- pen, comprising a casing, a cap on said casing, said casing and said cap forming a reservoir, said'cap having an outlet in the end thereof, a ball in said outlet, a strainer in described my invention, what said reservoir having a central boss, a rod passing through a perforation in said strainer, having a collar on the end thereof, a spring between said'collar and the strainer to yieldingly hold said collar in engagement with the ball in the outlet, said rod having an ofiset adapted to come in engagement with the boss on the strainer to limit the yielding movement of the ball.

4. A pen, comprising a casing forming a reservoir, said casing having an outlet in one end, a ball in said outlet, means for yieldingly holding said ball in said outlet, said ball being provided on its surface with indentations.

In testimony whereof I have signed my name to this Specification in the presence of two subscribing witnesses.

JOHN LABURT.

In presence of-- JOHN T. LANGILL, WM. H. CAMFIELD. 

